Benefit from other people's experience by checking on these frequently asked questions about freezers. There are many signs of a failed refrigerator defrost timer. problems contact webmaster@doityourself.com. Choose a symptom to see related freezer repairs. suggestions. This step-by-step repair guide and video show how to replace a freezer electronic control board. It moves air across the condenser coils to help cool the hot refrigerant coming out of the compressor. If the thermistor doesn't sense that the freezer is warm, the electronic control board won't turn on the compressor. Adjust the freezer door if it's not sealing properly. Replace the cold control thermostat if it doesn't cycle the compressor properly to maintain freezer temperature. Replace the thermistor if it's not sensing freezer temperature accurately. Turn the freezer back on, and wait for 10 minutes. The control board activates the compressor to keep the freezer cold and runs the fans. Find the perfect fit for your refrigerator. © 2020 Transform SR Brands LLC. If the cold control sensor fails or the internal contact inside the cold control isn't sending current to run the compressor, the freezer won't cool. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Freestanding freezer returning an error code? It moves air across the evaporator fins and through the cabinet for cooling. A failed evaporator fan motor can also prevent the freezer from cooling well because cooling air won't circulate through the freezer compartment. WARNING: Some thermostat components contain toxic substances, so think carefully about whether you want to troubleshoot it yourself. A failed condenser fan motor can inhibit freezer cooling because air doesn't move across the condenser coils to cool the refrigerant before the refrigerant enters the evaporator. Replace the condenser fan if it fails to run when activated. Troubleshooting a Chest Freezer That Doe... Troubleshooting a Chest Freezer That Doesn't Cool. Routine maintenance keeps your freezer working efficiently. Replace the thermostat in the freezer, and test the defrost timer again. This DIY repair guide and video show how to replace a freezer evaporator fan in 6 steps. The electronic control board-also called the main control board or the power control board (PCB)-manages the compressor and the defrost cycle. Your mercury vial should now be reset. If you don't hear the evaporator fan running inside the freezer when the compressor runs, you may need to replace the evaporator fan. A faulty relay on the electronic control board can also prevent the control board from sending power to the compressor. The thermistor is a temperature sensor inside the freezer. A failed electronic control board or a bad thermistor (also known as the temperature sensor) can also cause your freezer to warm up. Anything more than that, and the thermostat is defective. You may freely link Learn how to repair broken, frayed or damaged wires in your appliances. Dust-covered refrigerator coils can prevent the refrigerator and freezer from running efficiently and cooling properly. Need help finding the right filter for your refrigerator? When it trips, the defrost bi-metal shuts off the defrost heater. All Rights Reserved, How to replace a freezer defrost thermostat, How to replace a freezer electronic control board, How to replace a freezer temperature control thermostat, How to clean refrigerator condenser coils, How to repair broken or damaged wires video, How to use a multimeter to test electrical parts video. The electronic control board monitors temperature sensors to control freezer temperature and the defrost cycle. Once the thermostat has failed the Ohms test, then you should check the connections at the back. Not sure if I have fan problem or therm... Troubleshooting two-wire thermostat system. The defrost heating element melts frost from the evaporator fins to improve cooling. 1995-2018 MH Sub I, LLC dba Internet Brands. You'll typically see frost on the evaporator cover when the defrost system isn't working because the defrost heater isn't turning on to melt frost off the evaporator fins. Use your Sears.com account and we will show you the models you purchased at Sears. Lubricate the door seal with a light coat of petroleum jelly occasionally to prevent air leaks into the freezer. If the evaporator fan doesn't run when activated, replace it. While the wires have been removed, you can also examine them for signs of damage. If your freezer is too cold or not cold enough, the thermistor might be to blame. If the compressor runs but doesn't stay on long enough to keep the freezer compartment at 0 degrees, you may need to replace the cold control thermostat. The evaporator fan mounts on the evaporator assembly. The defrost thermostat on your fridge is an important piece of equipment which prevents your freezer from becoming too cold. A failed refrigerator defrost timer will usually result in a temperature change within the refrigerator. Clean the condenser coils with a coil brush. If the freezer still does not start to defrost, you may have to replace the thermostat completely. If this is your problem, then you should immediately place the defrost timer onto manual defrost. Common issues include erratic behavior from the thermostat or even complete malfunction. The freezer defrost sensor-also known as the defrost bi-metal or defrost termination thermostat-is next to the evaporator. If the defrost heating element fails, excessive frost covers the evaporator fins. Unplug the refrigerator before accessing and cleaning the coils. This can sometimes come out of alignment, and will need to be re-set. There's a lot going on in a fridge — components aplenty can all affect performance, like the coolant, condenser coils, door seals, the thermostat and even the ambient temperature in the living space. model heat pum... How to Repair a Refrigerator Defrost Hea... How to Repair a Refrigerator Defrost Heater. submitted to our "DoItYourself.com Community Forums". For freezers with an automatic defrost system, a broken defrost heating element or failed defrost bi-metal thermostat can prevent the defrost system from melting frost off the evaporator. We welcome your comments and Follow the instructions in your owner's manual for cleaning the condenser coils. How to Repair a Chest Freezer that Doesn... How to Repair a Chest Freezer that Doesn't Cool. Website operating WARNING: Mercury is toxic when inhaled or ingested, so proceed with caution before handling it. This should be stuck to the evaporator coil. You'll typically see frost on the evaporator cover when the defrost system isn't working because the defrost heater isn't turning on to melt frost off the evaporator fins. A failed cold control thermostat can also prevent the freezer from cooling properly. Pry off the connectors, using a pair of thin pliers if necessary, and remove the wires. It could be the condenser coils need to be cleaned. If your freezer isn't cold and you don't hear the fans or compressor running, the electronic control board could be the problem. However, from time to time, these devices can apparently fail, and cause problems which include leaks upon the floor, a warm refrigerator portion, or a freezer section which has ice forming across the back. The compressor is the problem if the motor won't start when the start relay actives it, or if the motor runs but the pump doesn't compress the refrigerant. Join our email list for updates and offers. Copyright© This step-by-step repair guide shows how to replace a chest freezer thermostat in less than 30 minutes. The defrost thermostat on your fridge is an important piece of equipment which prevents your freezer from becoming too cold. A faulty compressor won't compress the refrigerant in order to cool the freezer properly. The freezer will cool to temperature t... my fridge had a frozen defrost drain tube and leaked into bottom section. Turn off your power, and then remove the wiring from the thermostat, and connect them to your defrost heater. If you hear rattling, knocking or loud whining noises from the compressor, then you may need to replace the compressor. This should be easily managed when you are looking at the thermostat, the wires will be evident. The freezer won't cool properly when the evaporator fan breaks. Open up the thermostat, and find the small vial of mercury that measures the temperature. Use the advice and tips in these articles and videos to get the most out of your freezer. The evaporator won't be able to cool the freezer well when the evaporator cooling fins are caked with frost because the frost blocks air passages over the fins. When the thermostat has a consistent reading, you should see a Ohms setting of 0. You should check the voltage continuity of your thermostat, using a multimeter. This step-by-step repair guide and video show how to replace a freezer defrost heater. This should automatically trigger a warming of the freezer section. The electronic control board uses the reading from the thermistor to cycle the compressor on and off to maintain freezer temperature.